High voltage, high current, and high accuracy amplifier

a high-current, amplifier technology, applied in the field of amplifier circuits, can solve the problems of limiting the signal fidelity of what, limiting the power handling demands of amplifiers at high frequencies, and traditional high-negative feedback amplifier designs having a very difficult time producing highly damped signals,

Inactive Publication Date: 2008-11-11
HOOVER D ROBERT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These output transformers limit the signal fidelity of what is achievable with electrostatic speakers.
Traditional high negative feedback amplifier designs have a very difficult time producing highly damped, low distortion signals at high currents while maintaining feedback control, in many applications.
Capacitive loading also increases the power handling demands on the amplifier at high frequencies.
One common characteristic of many high negative feedback amplifiers is that the distortion effectively increases, as the signal level gets lower.
The constant correction of the feedback circuit induces extra output noise into the output signal.
The large time delays of the large output devices required for the high currents in traditional amplifiers, and the delays present in the multiple input stages of the amplifier, can also produce noticeable overshoot and input stage overload, especially at high currents and high frequencies.

Method used

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  • High voltage, high current, and high accuracy amplifier
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  • High voltage, high current, and high accuracy amplifier

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Embodiment Construction

[0037]The invention provides a method, an apparatus, and a system to obtain low distortion amplification of signals (e.g., audio-frequency signals, higher frequencies, or equivalent signals requiring low distortion amplification. Various embodiments of the invention can be applied to biological applications, medical applications, electronic applications, and any other applications where low distortion amplification can be beneficially used and needed for driving capacitive loads. In this specification, drawings, and claims, any instance of the term audio-frequency is defined as any signal frequency in the frequency range of 15 to 20,000 cycles per second (Hertz).

[0038]Other terms used below are defined as follows. Unipolar amplifier—An amplifier that has a single power supply, where the amplifier has a single output that is offset from the power supply rails. This output typically needs a blocking capacitor to provide an unbiased output with respect to a power supply reference. Bipo...

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Abstract

A method and system to use voltage isolated and floating differential output amplifiers wired in series and parallel to achieve arbitrary output drive voltage and current for the applications load. Embodiments use multiple voltage-isolated and linearized devices to enable dynamically modifiable, Class A, Class B, and Class AB topologies of predetermined voltage and current performance. Embodiments can correct an output by linearizing one or more devices in a circuit by utilizing a linearization module (e.g., including one or more digital lookup tables, an error simulation circuit, or an equivalent) to linearize at least one parameter of at least one device in the circuit.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a division of a co-pending U.S. utility patent application Ser. No. 11 / 325,884, filed Jan. 4, 2006, entitled “High Voltage, High Current, and High Accuracy Amplifier,” to be issued as U.S. Pat. No. 7,365,605 on Apr. 29, 2008. This application also claims priority from a U.S. provisional patent application Ser. No. 60 / 641,724, filed Jan. 5, 2005, by the same inventor, entitled “High Voltage, High Current, High Accuracy Solid State Audio Amplifier With Adaptive Performance Enhancement,” which is hereby incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]This invention relates to amplifier circuits, and in particular, to providing a lower distortion amplifier capable of creating high voltages to drive highly capacitive loads.[0004]2. Description of the Prior Art[0005]With the development of high performance audio formats like SACD and DVD-Audio, new demands are being placed on audio r...

Claims

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Application Information

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Patent Type & AuthorityPatents(United States)
IPC IPC(8): H03F1/26
CPCH03F1/3211H03F1/3247H03F3/211H03F3/301H03F3/3069H03F3/45376H03F3/45381H03F3/45475H03F2200/03H03F2200/45H03F2200/541H03F2201/3233H03F2203/45138H03F2203/45392
InventorHOOVER, D. ROBERT
OwnerHOOVER D ROBERT